Unipolar capacitor based high-efficiency pulse discharge circuit
A pulse discharge, unipolar technology, applied in the field of discharge circuits, can solve problems such as unfavorable electrolytic capacitor operation, and achieve the effect of improving long-term reliability and energy saving effect.
Inactive Publication Date: 2011-05-04
SHANGHAI RONGYU ELECTRONICS TECH
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Problems solved by technology
This method can use smaller electrolytic capacitors as energy storage capacitors. However, due to the existence of the conduction voltage drop of the diode itself, there is still a weak reverse voltage at the end of the output pulse. The existence of this weak reverse voltage is not conducive to electrolytic capacitors. Long-term, reliable work
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[0013] A high-efficiency pulse discharge circuit based on unipolar capacitors, including a control circuit 2, the signal input terminal of the control circuit 2 receives an external trigger signal, and the signal output terminal of the control circuit 2 is connected to the pulse discharge circuit 4 through a drive circuit 3, said The pulse discharge circuit 4 includes electrolytic capacitor C and inductance L, and the charging circuit 1 charges the pulse discharge circuit 4, such as figure 1 , 2 shown.
[0014] like figure 1 , 2 As shown, the pulse discharge circuit 4 is composed of an electrolytic capacitor C, a switch tube V1, a switch tube V2, a diode D1, a diode D2 and an inductance L. The electrolytic capacitor C adopts one electrolytic capacitor or a plurality of parallel electrolytic capacitors , the switch tubes V1 and V2 both use IGBT transistors. For large-capacity capacitive loads, the charging circuit 1 adopts a constant-current charging circuit with anti-short...
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The invention relates to a unipolar capacitor based high-efficiency pulse discharge circuit which comprises a control circuit, wherein the signal input end of the control circuit is used for receiving an external trigger signal, and the signal output end of the control circuit is connected with a pulse discharge loop through a drive circuit; the pulse discharge loop comprises an electrolytic capacitor C and an inductor L; and a charge circuit is used for charging the pulse discharge loop. In the invention, the unipolar capacitor, i.e. the electrolytic capacitor C is used as a long-term reliable energy storage element, thus the problem that backward voltage is generated on an energy storage capacitor after discharge ends is solved, and the long-term reliability of circuit elements and the whole circuit is improved. Meanwhile, the discharge circuit structure has the characteristic of energy recovery and obvious energy-saving effect during large-scale promotion.
Description
technical field [0001] The invention relates to a discharge circuit, in particular to a high-efficiency pulse discharge circuit based on unipolar capacitance. Background technique [0002] In the design of high-energy pulse power circuits whose load characteristics are mainly inductive, capacitors are usually used to charge and store energy. After the energy storage capacitor is charged to a certain voltage, a high-current thyristor (SCR) can be used as a discharge switch. The inductive load is triggered to discharge to obtain the corresponding pulse current output. The pulse discharge circuit based on this technical solution will form a reverse voltage on the energy storage capacitor due to the existence of the inductive load back electromotive force after the discharge process is over, and the working conditions of the reverse voltage will affect the stability of certain types of capacitors Work. Therefore, under the conditions of this occasion, the energy storage capaci...
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IPC IPC(8): H02M9/04
Inventor 周军崔斌曹江洪
Owner SHANGHAI RONGYU ELECTRONICS TECH